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A263781 Number of length n arrays of permutations of 0..n-1 with each element moved by -2 to 2 places and exactly two more elements moved upwards than downwards 1
0, 0, 0, 0, 0, 1, 3, 11, 31, 93, 248, 670, 1724, 4434, 11120, 27772, 68402, 167695, 407659, 986955, 2376323, 5702352, 13631753, 32500113, 77272919, 183336571, 434092838, 1026096990, 2421667040, 5707720617, 13436324063, 31596325769 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,7
COMMENTS
Column 2 of A263787
LINKS
EXAMPLE
All solutions for n=7
..2....0....2
..0....3....0
..1....1....1
..5....2....3
..3....6....6
..4....4....4
..6....5....5
CROSSREFS
Sequence in context: A108898 A291887 A217323 * A119901 A106934 A146581
KEYWORD
nonn
AUTHOR
R. H. Hardin, Oct 26 2015
STATUS
approved

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Last modified May 29 20:11 EDT 2024. Contains 372952 sequences. (Running on oeis4.)